Indian monsoon variations during three contrasting climatic periods: The Holocene, Heinrich Stadial 2 and the last interglacial–glacial transition
In contrast to the East Asian and African monsoons the Indian monsoon is still poorly documented throughout the last climatic cycle (last 135,000 years). Pollen analysis from two marine sediment cores (NGHP-01-16A and NGHP-01-19B) collected from the offshore Godavari and Mahanadi basins, both locate...
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/200574 2024-09-15T18:12:35+00:00 Indian monsoon variations during three contrasting climatic periods: The Holocene, Heinrich Stadial 2 and the last interglacial–glacial transition ZORZI, Coralie SANCHEZ GONI, Maria ANUPAMA, Krishnamurthy PRASAD, Srinivasan HANQUIEZ, Vincent JOHNSON, Joel GIOSAN, Liviu 2015-10-01 https://oskar-bordeaux.fr/handle/20.500.12278/200574 https://hdl.handle.net/20.500.12278/200574 https://doi.org/10.1016/j.quascirev.2015.06.009 EN eng 0277-3791 https://oskar-bordeaux.fr/handle/20.500.12278/200574 doi:10.1016/j.quascirev.2015.06.009 open Pas de Licence CC Climatology Indian monsoon Planète et Univers [physics]/Sciences de la Terre/Climatologie Article de revue 2015 ftoskarbordeaux https://doi.org/20.500.12278/20057410.1016/j.quascirev.2015.06.009 2024-06-23T23:36:25Z In contrast to the East Asian and African monsoons the Indian monsoon is still poorly documented throughout the last climatic cycle (last 135,000 years). Pollen analysis from two marine sediment cores (NGHP-01-16A and NGHP-01-19B) collected from the offshore Godavari and Mahanadi basins, both located in the Core Monsoon Zone (CMZ) reveals changes in Indian summer monsoon variability and intensity during three contrasting climatic periods: the Holocene, the Heinrich Stadial (HS) 2 and the Marine Isotopic Stage (MIS) 5/4 during the ice sheet growth transition. During the first part of the Holocene between 11,300 and 4200 cal years BP, characterized by high insolation (minimum precession, maximum obliquity), the maximum extension of the coastal forest and mangrove reflects high monsoon rainfall. This climatic regime contrasts with that of the second phase of the Holocene, from 4200 cal years BP to the present, marked by the development of drier vegetation in a context of low insolation (maximum precession, minimum obliquity). The historical period in India is characterized by an alternation of strong and weak monsoon centennial phases that may reflect the Medieval Climate Anomaly and the Little Ice Age, respectively. During the HS 2, a period of low insolation and extensive iceberg discharge in the North Atlantic Ocean, vegetation was dominated by grassland and dry flora indicating pronounced aridity as the result of a weak Indian summer monsoon. The MIS 5/4 glaciation, also associated with low insolation but moderate freshwater fluxes, was characterized by a weaker reduction of the Indian summer monsoon and a decrease of seasonal contrast as recorded by the expansion of dry vegetation and the development of Artemisia, respectively. Our results support model predictions suggesting that insolation changes control the long term trend of the Indian monsoon precipitation, but its millennial scale variability and intensity are instead modulated by atmospheric teleconnections to remote phenomena in the North Atlantic, ... Article in Journal/Newspaper Ice Sheet North Atlantic OSKAR Bordeaux (Open Science Knowledge ARchive) Quaternary Science Reviews 125 50 60 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Climatology Indian monsoon Planète et Univers [physics]/Sciences de la Terre/Climatologie |
spellingShingle |
Climatology Indian monsoon Planète et Univers [physics]/Sciences de la Terre/Climatologie ZORZI, Coralie SANCHEZ GONI, Maria ANUPAMA, Krishnamurthy PRASAD, Srinivasan HANQUIEZ, Vincent JOHNSON, Joel GIOSAN, Liviu Indian monsoon variations during three contrasting climatic periods: The Holocene, Heinrich Stadial 2 and the last interglacial–glacial transition |
topic_facet |
Climatology Indian monsoon Planète et Univers [physics]/Sciences de la Terre/Climatologie |
description |
In contrast to the East Asian and African monsoons the Indian monsoon is still poorly documented throughout the last climatic cycle (last 135,000 years). Pollen analysis from two marine sediment cores (NGHP-01-16A and NGHP-01-19B) collected from the offshore Godavari and Mahanadi basins, both located in the Core Monsoon Zone (CMZ) reveals changes in Indian summer monsoon variability and intensity during three contrasting climatic periods: the Holocene, the Heinrich Stadial (HS) 2 and the Marine Isotopic Stage (MIS) 5/4 during the ice sheet growth transition. During the first part of the Holocene between 11,300 and 4200 cal years BP, characterized by high insolation (minimum precession, maximum obliquity), the maximum extension of the coastal forest and mangrove reflects high monsoon rainfall. This climatic regime contrasts with that of the second phase of the Holocene, from 4200 cal years BP to the present, marked by the development of drier vegetation in a context of low insolation (maximum precession, minimum obliquity). The historical period in India is characterized by an alternation of strong and weak monsoon centennial phases that may reflect the Medieval Climate Anomaly and the Little Ice Age, respectively. During the HS 2, a period of low insolation and extensive iceberg discharge in the North Atlantic Ocean, vegetation was dominated by grassland and dry flora indicating pronounced aridity as the result of a weak Indian summer monsoon. The MIS 5/4 glaciation, also associated with low insolation but moderate freshwater fluxes, was characterized by a weaker reduction of the Indian summer monsoon and a decrease of seasonal contrast as recorded by the expansion of dry vegetation and the development of Artemisia, respectively. Our results support model predictions suggesting that insolation changes control the long term trend of the Indian monsoon precipitation, but its millennial scale variability and intensity are instead modulated by atmospheric teleconnections to remote phenomena in the North Atlantic, ... |
format |
Article in Journal/Newspaper |
author |
ZORZI, Coralie SANCHEZ GONI, Maria ANUPAMA, Krishnamurthy PRASAD, Srinivasan HANQUIEZ, Vincent JOHNSON, Joel GIOSAN, Liviu |
author_facet |
ZORZI, Coralie SANCHEZ GONI, Maria ANUPAMA, Krishnamurthy PRASAD, Srinivasan HANQUIEZ, Vincent JOHNSON, Joel GIOSAN, Liviu |
author_sort |
ZORZI, Coralie |
title |
Indian monsoon variations during three contrasting climatic periods: The Holocene, Heinrich Stadial 2 and the last interglacial–glacial transition |
title_short |
Indian monsoon variations during three contrasting climatic periods: The Holocene, Heinrich Stadial 2 and the last interglacial–glacial transition |
title_full |
Indian monsoon variations during three contrasting climatic periods: The Holocene, Heinrich Stadial 2 and the last interglacial–glacial transition |
title_fullStr |
Indian monsoon variations during three contrasting climatic periods: The Holocene, Heinrich Stadial 2 and the last interglacial–glacial transition |
title_full_unstemmed |
Indian monsoon variations during three contrasting climatic periods: The Holocene, Heinrich Stadial 2 and the last interglacial–glacial transition |
title_sort |
indian monsoon variations during three contrasting climatic periods: the holocene, heinrich stadial 2 and the last interglacial–glacial transition |
publishDate |
2015 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/200574 https://hdl.handle.net/20.500.12278/200574 https://doi.org/10.1016/j.quascirev.2015.06.009 |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_relation |
0277-3791 https://oskar-bordeaux.fr/handle/20.500.12278/200574 doi:10.1016/j.quascirev.2015.06.009 |
op_rights |
open Pas de Licence CC |
op_doi |
https://doi.org/20.500.12278/20057410.1016/j.quascirev.2015.06.009 |
container_title |
Quaternary Science Reviews |
container_volume |
125 |
container_start_page |
50 |
op_container_end_page |
60 |
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1810450176619315200 |